1213847543 has 2 divisors, whose sum is σ = 1213847544. Its totient is φ = 1213847542.

The previous prime is 1213847507. The next prime is 1213847573. The reversal of 1213847543 is 3457483121.

It is a strong prime.

It is an emirp because it is prime and its reverse (3457483121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213847543 - 2¹⁴ = 1213831159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213847497 and 1213847506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213847573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606923771 + 606923772.

It is an arithmetic number, because the mean of its divisors is an integer number (606923772).

Almost surely, 2^1213847543 is an apocalyptic number.

1213847543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213847543 is an equidigital number, since it uses as much as digits as its factorization.

1213847543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 1213847543 is about 34840.3149095986. The cubic root of 1213847543 is about 1066.7305046537.

The spelling of 1213847543 in words is "one billion, two hundred thirteen million, eight hundred forty-seven thousand, five hundred forty-three".